c# for absolute beginners

C # Have you read all of these basics? (1) ----- for beginners only, 1. Comment (if you do not write a comment, it is a rogue, and the name is nonsense)'//' Is generally used for annotation functions and annotation classes.2. Shortcut KeysCtrl + k + d (alignment fails due to syntax errors)Ctrl + j (only prompt is displayed in the quick pop-up)Shift + end, shift + home keys from the beginning of the row to t

Originally did not have this article, but yesterday after the blog, found that it was only based on beginners to learn the article, but it has been a lot of people's evaluation. So let's add a little bit of knowledge today.One: csc compilesWe often write c#net programs, often relying on our code development tools, that is, Visual Studio (Ide), but we know our code itself knowledge of a bunch of strings of t

UnderstandingObjective-CSome basic operations for beginners are described in this article.Objective-CClass declaration, definition, instance, initialization content, let's look at the details. Objective-CThe calling method is called sending a message, and the notification object performs an operation. Syntax: [shapedraw] I. Class declaration Interface ): @interfaceTestCoop:NSObject{ intiMonth; intiYear; intiDay; } -(void)

One: What is variable variable is for the computer software storage data. Where is the data stored? Hard disk or memory?? One thing to note here is that our data is usually stored in the computer's memory when we are running the program. And what data is saved on the hard drive! In fact the hard disk in the computer architecture data external storage equipment. They store the original data stored by the computer. Normally we become an input-output operation (i/0) operation on the data on the har

Notes for beginners to edit C Language Common mistakes made by new users 1. Note that the case sensitivity is different in C language, but there is no difference by default in windows, but sometimes there will be bugs. 2. Pay attention to defining the variables you use during programming. 3. The end of each line of code must end with a semicolon 4. The "" nu

Phper beginners objective-c reading notes (1) Basic syntax: static definitions change the scope of global variables and correspond to local scopes. Extern is similar to global in php. The struct defines a multi-dimensional kv array, which is an enumeration type enum that detects the data range. the two use typede phper to Learn objective-c reading notes (1) Bas

Select a file from one directory, copy to another directory1 stringSourcephotopath = This. Getuserselectedphoto ();2 if(Sourcephotopath = =NULL)3 {4 return;5 }6 stringsourceFileName =System.IO.Path.GetFileName (sourcephotopath);7 //Save the picture to a folder8 stringUserName = This. Loginusername;9 stringNewPath =@"Images";Ten if(!System.IO.Directory.Exists (NewPath)) One

After touching the OC language for some time, we all know that an object of unknown type can be represented by an ID, so what is instancetype for?The role of 1.instancetypeis to make the methods of the non-associative return type return the type of the class2. Benefits of using InstancetypeA. The ability to determine the type of object can help the compiler to better locate code for us to write problemsB. The compiler is able to detect whether a method is implemented based on the returned data t

String problems1#include 2 using namespacestd;3 4 intMain ()5 {6 strings ="qwe";7 stringCun ="v";8Cun [0] = s[0];9Cun [1] = s[1];Ten for(auto W:cun) Onecout W; Acout Endl; -cout "end of Cycle 1"Endl; -cout "end of Cycle 2"Endl; thecout 1]; - } - -/ +*Why not assign a value to a variable cun -*Why does the output have garbled, not all end to empty all the cout? +* Why the last cun[1], and can be output correctly, how the for loop is looped here A/A collection of code problems that

contest questions preliminary question. Ideas are as follows: 1, meet the requirements of the number is continuous, so as long as the selection of the starting value added sum can; 2. Be sure to traverse all possible starting values and make the loop as few times as possible. As you can see, a number is composed of at least two numbers, and because these two numbers are contiguous. So the maximum starting value is not greater than one-second of the number. The code is as follows, VC6.0 verif

Object-Oriented Programming: Concepts of classes and objects [Description: This article is for beginners to just contact programming to see, the big guys may seem to feel very simple, don't blame] Classes (Class) Object-oriented thought comes from the cognition of the real world. The real world is so complex and diverse that it is difficult to know and understand. But smart people have learned to classify these intricate things, thus making the wor

Code: Using system; Using system. Collections. Generic; Using system. LINQ; Using system. text; Using system. Data. sqlclient; Using system. Data; Using system. collections; Namespace interview questions { Class for beginners { Public void notice () { // 1. Use the string variable String test = "dinglang "; // Determine whether the string contains content If (test. length> 0) { } // However, this object may be null, so you c

When I first came into contact with the concept of "Thread", I thought it was difficult to understand. I read many books and it took a long time to understand its true meaning. Now I will describe the "multithreading" that I understand as a beginner. This is a seriesArticleTo demonstrate the basic concepts related to threads. Hope to help beginners. The language is relatively refined and needs to be read repeatedly in some places. Directory (to see th

When I first came into contact with the concept of "Thread", I thought it was difficult to understand. I read many books and it took a long time to understand its true meaning. Now I will describe the "multithreading" that I understand as a beginner. This is a seriesArticleTo demonstrate the basic concepts related to threads. Hope to help beginners. The language is relatively refined and needs to be read repeatedly in some places. Directory (for more

If you're not sure what kind of software development you're going to do in the future, just want to learn a programming language, starting from C + + is a good choice.To be persistent, do not learn some C + + today, learn some VB tomorrow, and finally learn more than 10 languages, are only understand the fur.Learn C + + does not need

changeThe C + + pointer and reference should be close to the type rather than the variables.ex:float* x (o) float *x (x)int x = y; (o) int x = y (x)Pass by Reference:reference can make the function parameters, adjust the use of ordinary variable canFunction:swap (int A, int b);Adjust: Swap (NUM1, num2); There are three meanings of the reference relations operators use the rules to distinguish　　more on the type of the tense (For what is more? Because

For beginners of C Programming in linux, If You Want To compile a url Decoding program, you may encounter the following problems: Linux general technology-Linux programming and kernel information. Problem Background: fedora 10 is currently used. Every time a resource is downloaded from CSDN, if the file name of the resource is Chinese, the file name becomes garbled when downloaded to the hard disk. The od t

] Integral, C.mingcheng name, [Num],[price]From [W_dingdan] a joins [w_dingdanproduct] B on A.id=b.dingdanid left joins [W_caipin_goumai] C on C.id =b.productidWhere a.[zhuangtai]= ' already orders ') s;6, click DataGridView Control Point right mouse button to select the action (add control ContextMenuStrip)?Cellclick Event Control for DataGridViewDgvorderdish.rows[e.rowindex]. ContextMenuStrip = Cmsstorename;Dishorderno = Dgvorderdish.rows[e.rowindex

This article is written to C # For Beginners. The veteran will not read it. It is actually about LINQ. Thank you for reminding me on the first floor. In many cases, it is easy to pick out a list of elements from a relational table and use SQL statements. In fact, similar methods can also be used in the C # list, although the select (), where () and other statemen

First, create a threadThroughout the series, we primarily use visual Studio 2015 as the primary tool for threading programming. Creating and using threads in the C # language requires only the following steps to write:1. Start Visual Studio 2016 and create a new console application.2. Ensure that the console program uses the. NET Framework version 4.6 or later. However, all the examples in this article use a lower version to work correctly.3. Double-c